Dye vat for dying piece goods



Aug. 30, 1932. H. o. WEISE 1,874,398

DYE VATS FOR DYEING PIECE GOODS Filed Sept. 4, 1929 Patented Aug. 30, 1932 UNITED STATES HERMANN OSWALD WEISE, OF ZITTAU, GERMANY DYE VAT FOR DYING PIECE GOODS Application filed September 4, 1929, Serial No. 390,308 and in Germany January 17, 1928.

. Known dyeing vats for iece goods with separate compartments for' yeing and chemicals consist of a single container provided with a perforated partition between the two compartments.

It has now been found that such vats have serious drawbacks, due to their large surface for evaporation, giving rise to' a large formation of vapour and absorbing a considerable quantity of heat. Owing to the large formation of vapour in the dyeing chamber, a very large plant is required for its dissipation, and this involves a high cost in construction and working.

All these drawbacks are obviated, or at least very much reduced, by the dyeing vat according to this invention, in which the compartment containing the dye and chemicals is provided with one or more covering devices and is separated from the dyeing compartment by a perforated heating wall, of which the perforated portion extends only to the lowest level of the dye liquor.

This construction of the wall ensures that no vapour can find its way into the dyeing compartment through perforations above the level of the liquid.

The loss of heat and the formation of vapour in the compartment can be still further reduced if the dyeing compartment, as well as the compartment containing the chemicals, is covered by one or more closing devices. In this construction, perforating the dividing wall is not absolutely necessary,'but, it is preferable for cases in which for any reason the dyeing compartment must be partially or enti rely uncovered.

A constructional example according to the invention is represented in the accompanying drawing, in which- I Fig. 1 is a vertical section of a vat and Fig. 2, a top plan. v

The vat (Figs. 1 and 2) consists of a liquor container a which is divided by a perforated heating wall 7) into the actual dyeing compartment c and the compartment d for the dye and chemicals. The perforations of-the wall I) extend only to a half of the total height of the vat i. e. to the lowest level w of the liquor, the highest level being indicated at y the so that no vapour can pass into the dyeing compartment througbany perforations above this level and escape thence into the open air. The compartment (1 is closed by two plates e and f and a pivoted lid 9 which prevent any large surface'for evaporation and reduce the whole heat losses by about 40 per cent.

In the lower part of the compartment (1 a perforated tube it serves for heating the dye liquor and at the ,same time ensures a good circulation of the liquor in the opposite direction to the movement of the goods.

Instead of a single cover 9, the compartment d can be closed by several adjacent covers. Also, instead of the pivoted cover, 5 flaps, slides or the like can be used.

The compartment cis closed by a door It extending over the whole length of the chamber, a passage 6 serving for introducing the goods and an upper member 7: serving as the 7; outlet passage for the goods By guiding oods to be treated for a small distance outside the vat the progress of the dyeing operation can be observed readily and conveniently.

The drum Z and a co-operating roller m serve for moving the goods through the dye liquor. The drum and the roller are connected by gear wheels 11. and 0 and close the passage 71 at the top. A hinged door p is arso ranged in one side wall of the passage 73. In order that the dye liquor dropping from the drum lshall not be lost, a pan (7 is provided which returns the liquor into the passage 2'.

The upper member is is also provided at one 35 side wall with a hinged door r and above with guides a through which the goods pass.

In this vat the goods, which are preferably in the form of endless sheets, skeins or strandlike bodies. are or may be guided solely by the drum Z, which is preferably arranged so as to .form a tight closure with the opposite wall of the passage 11.

By the complete closure of the whole vat obtained in this manner the formation of vapour is practically suppressed. Also, the heat losses are reduced by about 60 per cent. due to the formation of an insulating layer of vapour over the liquor.

I claim 1. A dye vat for piece goods comprising separate compartments for the actual dyeing and for 'the chemicals, closing devices for the dyeing compartment said devices having openings, and closures for said openings in-.

y the dyeing compartment, and a perforated wall separating said compartments, said perforations lying below about half the height of the wall measured from the bottom.

4. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, a perforated wall separating said compartments, closing devices for said compartments, the perforations in the wall lying below about half the height of the wall measured from the bottom.

5. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming an upper vertical passage including an aperture for the entrance of an endless length of piece goods and means for guiding said goods for a short distance outside the covered vat.

6. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming an upper vertical passage having an aperture for the entrance of an endless length of the piece goods and a drum closing said passage.

7. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming an upper vertical passage having an aperture for the entrance of an endless length of the piece goods, and a drum and a cooperating roller closing said passage.

8. dye vat for piece goods comprising passage, and a pan below the drum for returning the drippings of dye liquor to the dye vat.

9. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming upper vertical passages with an inlet and an outlet opening respectively and means for guiding endless lengths of piece goods for a small distance outside the covered vat.

10. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming upper vertical passages with an inlet and an outlet opening respectively for endless lengths of material to be dyed, and guides for such endless lengths of piece goods said guides closing said openings.

11. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming upper vertical passages with an inlet and an outlet opening respectively for endless lengths of material to be dyed, guides for such endless -len hs of piece goods said guides closing sai openings, and doors in the side walls of the passages.

12. A dye vat for piece goods comprising separate compartments for the actual dyeing and for the chemicals, closing devices for said compartments, the closing device for the dyeing compartment forming upper vertical passages with an inlet and an outlet opening respectively for endless lengths of material to be dyed, guides for such endless lengths of piece oods said guides closing said openings, ant? doors in the side walls of the passages and in the cover of the two compartments.

HERMANN OSWALD WEISE.

separate compartments for the actual dyeing v and for the chemicals, closing devices for said compartments, the closing device for the dyeingcompartment forming an upper vertical passage having an aperture for the entrance of an endless length of piece goods, a drum and a cooperating roller closing said 

